Fix DKEK import when no logged.

DKEK shall accept import even if it is not logged in. However, to store the DKEK, the PIN is used for MKEK, which is not available if it is nog logged in. I added a queueing system to store a pending DKEK after login.

Therefore, to import a DKEK, the user must import it AND call VERIFY command if it is not already logged in.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/hsm/sc_hsm.c

@@ -407,6 +407,10 @@ int check_pin(const file_t *pin, const uint8_t *data, size_t len) {
         hash_multi(data, len, session_sopin);
         has_session_sopin = true;
     }
+    if (pending_save_dkek != 0xff) {
+        save_dkek_key(pending_save_dkek, NULL);
+        pending_save_dkek = 0xff;
+    }
     return SW_OK();
 }